High-density lipoprotein in diabetes: Structural and functional relevance.

Area of Science:

• Cardiovascular Science
• Metabolic Disease Research
• Lipidology

Background:

• Low high-density lipoprotein-cholesterol (HDL-C) is a known cardiovascular risk factor, but recent evidence suggests a U-shaped association.
• HDL's cardioprotective effects are increasingly linked to particle function over cholesterol content.
• HDL particles possess diverse functions including cholesterol efflux, antioxidant, anti-inflammatory, and vasoactive properties crucial for cardiometabolic health.

Purpose of the Study:

• To explore the complex role of HDL in cardiometabolic conditions, particularly in diabetes.
• To investigate how HDL composition and function are altered in diabetes.
• To highlight the potential of HDL-targeting therapeutics for managing diabetes and cardiovascular disease.

Main Methods:

• Review of current literature on HDL structure, function, and its relationship with diabetes and cardiovascular disease.
• Analysis of proteomic and lipidomic studies examining HDL modifications in diabetic states.
• Examination of the anti-diabetic effects of HDL, including impacts on insulin sensitivity and beta-cell function.

Main Results:

• HDL particles are heterogeneous with multiple functions vital for cardiometabolic health.
• Diabetes, especially with poor glycemic control, leads to quantitative and qualitative HDL changes, impairing its function.
• HDL exhibits anti-diabetic properties by enhancing insulin sensitivity and beta-cell function.

Conclusions:

• HDL's functional capacity, rather than just cholesterol levels, is critical for cardiovascular protection.
• Therapeutic strategies focusing on enhancing HDL function, such as using recombinant HDL or apolipoprotein A-I mimetic peptides, show promise for treating diabetes and cardiovascular disease.